GHS LJ40TM Signature Bronze Medium Acoustic Guitar Strings 'High performance strings for the most demanding player '--LJ Gauges: 13-17-26-36-46-56 From his work in Wings to his studio wizardry, Laurence Juber has earned the respect of musicians worldwide His Signature strings feature a cryogenically treated copper, tin, and phosphor alloy wound over a hex, bronze-plated core The result is long-lasting, rich, bright tone